Home / 20,425.62-28,200.41-13,629.34

Finding the Fourth Proportional to 20,425.62, 28,200.41 and 13,629.34

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Solution

The fourth proportional to 20,425.62, 28,200.41 and 13,629.34 is: 18,817.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,425.62 : 28,200.41 = 13,629.34 : x
  2. Step 2: Convert to fraction form
    20,425.62/28,200.41 = 13,629.34/x
  3. Step 3: Cross multiply
    20,425.62x = 28,200.41 × 13,629.34
  4. Step 4: Simplify right side
    20,425.62x = 384,352,994.24
  5. Step 5: Solve for x
    x = 384,352,994.24/20,425.62
  6. Step 6: Final answer
    x = 18,817.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.